Process for the production of new vat dyestuffs



United States Patent PROCESS FOR THE PRODUCTION OF NEW VAT DYESTUFFS FritzBaumann, Leverkusen-Bayerwerk, and Hans-Samuel Bien, Leverkusen, Germany, assignors to Farbenfabriken Bayer Akfiengesellschaft, Leverkusen, Germany, a corporation of Germany No Drawing. Application May '18, 1956 Serial No. 585,607

1'1 Claims. (Cl. 260247.1)

This invention relates to new vat dyestuffs of the anthraquinone series.

It is an object of the present invention to provide new valuable vat dyestuffs which dye cotton in olive green shades. A further object is to provide dyestuffs which exhibit excellent fastness properties. Further objects will appear hereinafter.

These objects are attained in accordance with the present invention by introducing into the dyestuffs which may be obtained from E2 1-benzanthronylamino-dianthrimides by condensation with aluminium chloride complex compounds, or from E2 lbenzanthronylamino-dianthrimide carbazoles by condensation with alcoholic potassium hydroxide, sulphonic acid chloride groups, and by reacting the latter with ammonia or primary or secondary organic bases.

2,901,479 Patented Aug. 25, 1959 ICC.

heated to 80 C. for some time and to the boil for a brief period. The sulphodimethyl amide thus formed is filtered off by suction and, if necessary, Washed with 30 percent pyridine water in order to remove the sulphonic acid. The dyestuff obtained in a very good yield dissolves in concentrated sulphuric acid with a bluecolour and dyes cotton in olive-green shades of very good fastness properties.

Instead of dimethylamine there may also be used monomethylamine, piperidine, morpholine, 1,2,3,4-tetrahydroquinoline or ammonia. The dyestuifs thus obtained possess similar very fast shades.

Similar results are obtained by using instead of the above dyestuif the dyestutf which is obtained according to the process described in Example 6 of the copending US. patentspecification Ser. No. 520,621 by an alcoholic alkali metal melt of Bz 1 -benzanthronyl-S-irnino-lJf-dianthrimid carbazoles.

The dyestuifs used as starting material for the process according to the present invention may be obtained, for example, according to the process described in our copending United States patent specification Serial No. 520,621, filed July 7, 1955 (now Patent No. 2,805,224), by treating Bz l-benzanthronylamino-l,1'-dianthrimides at elevated temperature, e.g. 120 C. with a complex compound which is obtained by reacting aluminium chloride and a base such as pyridine, quinoline or dimethyl aniline, or by condensation of B2 1-benzanthronylamino-dianthrimide carbazoles with alcoholic potassium. hydroxide.

The conversion of these dyestuffs into the sulphonamides may be effected in usual manner by treating them with chlorosulphonic acid in the presence or absence of phosphorus pentachloride or thionyl chloride, and subsequent reaction with ammonia or primary or secondary organic bases such as monomethyl-amine, dimethyl-amine, morpholine, piperidine, 1,2,3,4-tetrahydroquinoline or aniline.

The dyestuffs obtained according to the new process exhibit compared with the dyestuffs used as starting materials a shade strongly shifted to green, from khaki for instance to olive green, while the vat dyestulfs containing sulphonarnide groups as described in German patent specification No. 655,591 have a dyeing effect only a little more blue than the nonsulphonated product. The new vat dyestuffs obtained according to the process of the present invention are, moreover, far superior in their wet-fastness to those described in German patent specification No. 655,591.

The following examples are given for the purpose of illustrating the invention.

Example 1 6.7 grams of a dyestufl prepared according to the process described in Example 1 of our copending US. patent specification Ser. No. 520,621 are dissolved in millilitres of chloro-sulphonic acid at 20-30 C. After the sulphochlorination is completed, the melt is placed on ice, filtered off by suction and washed to neutral reaction. For the further reaction, the moist filter cake is stirred with 100 millilitres of 30 percent dirnethylamine solution at room temperature for a few hours, the suspension is 6.7 grams of the dyestuif of the preceding example are heated in a mixture of 67 millilitres of chlorosulphonic acid and 6.7 grams of phosphorus pentachloride or 2 cc. of thionyl chloride to 60 C. for 2 hours. After cooling, the mixture is placed on ice, filtered olf by suction and Washed to neutral reaction. The moist filter cake is then evaporated to dryness with millilitres of 60 percent dimethylamine solution. In order to remove the salts thereby formed, the residue is boiled out twice with water. The dyestufi obtained in quantitative yield dis solves in sulphuric acid with a reddish blue colour, dyeing cotton in very fast yellowish olive-green shades.

Instead of dimethylamine there may also be used monomethylamine, piperidine, morpholine, 1,2,3,4-tetrahydro quinoline or ammonia. possess similar very fast shades.

We claim:

1. A dyestulf which is obtained by treating a member selected from the group consisting of dyestufis formed by (a) condensing a Bz 1-benzanthronylamino-5-amino-1,1- dianthrimide with a complex compound of aluminum chloride and a base of the group consisting of amines and ammonia and (b) by condensing a Bz l-benzanthronyl-S-amino-l,1'-dianthrimide carbazol with alcoholic potassium hydroxide, with chlorosulphonic acid at an elevated temperature and reacting the compound thus obtained with an excess of a member selected from the group consisting of ammonia, monomethyl amine, dimethyl amine, piperidine, morpholine, 1,2,3,4-tetrahydroquinoline and aniline at a temperature up to about 100 C.

2. A dyestufi which is obtained by treating a dyestulf formed by condensing a B2 l-benzanthronyl-S-amino-l,1- dianthrimide with a complex compound of aluminum chloride and a base of the group consisting of amines and ammonia, with chlorosulphonic acid at an elevated temperature, reacting the compound thus obtained with an excess of dimethyl amine at a temperature up to about 100 C. and recovering the dyestutf formed.

3. A dyestufr" which is obtained by treating a dyestufi formed by condensing a B2 l-benzanthronyl-S-amino-1,1- dianthrimide with a complex compound of aluminum chloride and a base of the group consisting of amines and ammonia, with chlorosulphonic acid at an elevated temperature, reacting the compound thus obtained with an excess of piperidine at a temperature up to about 100" C. and recovering the dyestufi formed.

4. A dyestuff which is obtained by treating a dyestufi formed by condensing a Bz l-benzanthronyl-S-amino-l,1'- dianthrimide with a complex compound of aluminum chloride and a base of the group consisting of amines and ammonia, with chlorosulphonic acid at an elevated tem- The dyestulfs thus obtained perature, reacting the compound thus obtained with an excess of morpholine at a temperature up to about 100 C. and recovering the dyestufl formed.

5.. A dyestutf which is obtained by treating a dyestufi formed by condensing Bz l-benzanthronyl-S-amino-l,1- dianthrirnide with a complex compound of aluminum chloride anda base of the group consisting of amines and ammonia, with chlorosulphonic acid at an elevated temperature, reacting thercompound thus obtained with an excess of 1,2,3,4-tetrahydroquinoline at a temperature up to about 100 C. and recovering the dyestuff formed.

6. A process for the production of new vat dyestuffs which comprises treating a member selected from the group consisting of the dyestuffs which may be obtained by condensing B2 1 benzanthronyl 5 amino-1,1-dianthrimides with a complex compound of aluminium chloride with a base of the group consisting of amines and ammonia and by condensing Bz l-benzanthronyl-S- amin-1,1'-dianthrimide carbazols with alcoholic potassium hydroxide, with chlorosulphonic acid at an elevated temperature and reacting at a temperature up to about 100 C. the compound thus obtained with an excess of a member selected from the group consisting of ammonia, monomethyl amine, dimethyl amine, piperidine, morpholine, 1,2,3,4-tetrahydroquinoline and aniline.

7. The process as claimed in claim 6, wherein the treatment with chlorosulphonic acid is carried out in the presence of a member selected from the group consisting of phosphorus pentachloride and thionylchloride.

' 8. A process for the production of new vat dyestuffs :which comprises treating a member selected from the group consisting of the dyestuffs which may be obtained by condensing Bz 1 benzanthronyl 5 amino-l,l-di- 'anthrimides with a complex compound of aluminium chloride with a base of the group consisting of amines andammonia andby condensing Bz l-benzanthronyl-S- "amino-l,1'-dianthrimide carbazols with alcoholic potas- "sium hydroxide, with chlorosulphonic acid at an elevated temperature and reacting at a temperature up to about 100 C. the compound thus obtained with an excess of dimethyl amine.

anthrimides with a complex compound of aluminium chloride with a base of the group consisting of amines 10. A process for the production of new vat dyestuffs which comprises treating a member selected from the group consisting of the dyestuffs which may be obtained by condensing B2 1 benzanthronyl 5 amino-1,1-dianthrimides with a complex compound of aluminium chloride with a base of the group consisting of amines and ammonia and by condensing Bz l-benzanthronyl-S- amino-1,1-dia:1thrimide carbazols with alcoholic potassium hydroxide, with chlorosulphonic acid at an elevated temperature and reacting at a temperature up to about C. the compound thus obtained with an excess of morpholine.

11..A process for the production of new vat dyestuffs which comprises treating a member selected from the group consisting of the dyestuflls which may be obtained by condensing B2 1 benzanthronyl 5 amino-1,1-dianthrimides with a complex compound of aluminium chloride with a base of the group consisting of amines and ammonia and by condensing Bz l-benzanthronyl-S- amino-1,1'-dianthrimide carbazols with alcoholic potassium hydroxide, with chlorosulphonic acid at an elevated temperature and reacting at a temperature up to about 100 C. the compound thus obtained with an excess of 1,2,3,4-tetrahydroquinoline.

References Cited in the file of this patent UNITED STATES PATENTS 2,029,239 Kranzlein et a1 Jan. 28, 1936 r 2,140,873 'Hanold Dec. 20, 1938 2,278,977 Dettwyler Apr. 7, 1942 2,360,010 Ogilvie Oct. 10, 1944 2,426,547 Buckley et a1. Aug. 26, 1947 FOREIGN PATENTS 467,919 Great Britain June 25, 1937 OTHER REFERENCES Houben: Das Anthracen Und Dic Anthrachinone, pp. 411 and 412, Georg, Thieme/Verlag/Leipzig (1929). 

1. A DYESTUFF WHICH IS OBTAINED BY TREATING A MEMBER SELECTED FROM THE GROUP CONSISTING OF DYESTUFFS FORMED BY (A) CONDENSING A BZ 1-BENZANTHRONYLAMINO-5-AMINO-1,1'' DIANTHRIMIDE WITH A COMPLEX COMPOUND OF ALUMINUM CHLORIDE AND A BASE OF THE GROUP CONSISTING OF AMINES AND AMMONIA AND (B) BY CONDENSING A BZ 1-BENZANTHRONYL-5-AMINO-1,1''-DIANTHRIMIDE CARBAZOL WITH ALCOHOLIC POTASSIUM HYDROXIDE, WITH CHLOROSULPHONIC ACID AT AN ELEVATED TEMPERATURE AND REACTING THE COMPOUND THUS OBTAINED WITH AN EXCESS OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF AMMONIA, MONOMETHYL AMINE, DIMETHYL AMINE, PIPERDINE, MORPHOLINE, 1,2,3,4-TETRAHYDROQUINOLINE AND ANILINE AT A TEMPERATURE UP TO ABOUT 100* C.
 4. A DYESTUFF WHICH IS OBTAINED BY TREATING A DYESTUFF FORMED BY CONDENSING A BZ 1-BENZANTHRONYL-5-AMINO-1,1''DIANTHRIMIDE WITH A COMPLEX COMPOUND OF ALUMINUM CHLORIDE AND A BASE OF THE GROUP CONSISTING OF AMINES AND AMMONIA, WITH CHLOROSULPHONIC ACID AT AN ELEVATED TEMPERATURE, REACTING THE COMPOUND THUS OBTAINED WITH AN EXCESS OF MORPHOLINE AT A TEMPERATURE UP TO ABOUT 100* C. AND RECOVERING THE DYESTUFF FORMED. 